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Technical Data Sheet
P28278B ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The GUIDE,VALVE STEM is a the manufacturer industrial component. Key specifications include material: IRON CAST, bore_diameter: 0.5000 INCHES NOMINAL IN, overall_length: 4.250 INCHES NOMINAL IN, aa_end_diameter: 0.870 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN, bore_counterbore: INCLUDED, bore_countersink: NOT INCLUDED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2815-00-798-3532, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
P28278B
NSN: 2815-00-798-3532
FSC: 2815
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialIRON CAST
bore_diameter0.5000 INCHES NOMINAL IN
overall_length4.250 INCHES NOMINAL IN
aa_end_diameter0.870 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN
bore_counterboreINCLUDED
bore_countersinkNOT INCLUDED
outside_diameter1.225 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN
counterbore_depth0.469 INCHES NOMINAL IN
counterbore_diameter0.510 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
counterbore_locationAA END
aa_end_chamfer_length0.031 INCHES NOMINAL IN
bb_end_chamfer_length0.125 INCHES NOMINAL IN
NSN2815-00-798-3532
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GUIDE,VALVE STEM TITLE COMPONENT PN P28278B MFR GUIDE,VALVE STEM
KEY FEATURES
COUNTERBORE DIAMETER: 0.510 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
AA END DIAMETER: 0.870 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN
BORE COUNTERSINK: NOT INCLUDED
MATERIAL: IRON CAST
COUNTERBORE DEPTH: 0.469 INCHES NOMINAL IN
BB END CHAMFER ANGLE IN DEG: 45.0
BORE DIAMETER: 0.5000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
COUNTERBORE DIAMETER0.510 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
AA END DIAMETER0.870 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN
BORE COUNTERSINKNOT INCLUDED
MATERIALIRON CAST
OVERALL LENGTH4.250 INCHES NOMINAL IN
COUNTERBORE DEPTH0.469 INCHES NOMINAL IN
BB END CHAMFER ANGLE IN DEG45.0
BORE DIAMETER0.5000 INCHES NOMINAL IN
METALLIC HARDNESS RATING27.0 MINIMUM ROCKWELL C AND 37.0 MAXIMUM ROCKWELL C
BB END CHAMFER LENGTH0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
9744Interchangeable
interchangeable cross-reference
interchangeable
28278Interchangeable
interchangeable cross-reference
interchangeable
P28278Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P28278B?
P28278B is a GUIDE,VALVE STEM.
What parts can replace P28278B?
There are 3 known substitutes for P28278B: 9744, 28278, P28278. Substitute compatibility should be verified for your specific system.
Is P28278B still available?
P28278B is currently cancelled.
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